comfort



s. COMFORT, Jr. SEWING MACHINE.

No. 32,239 Patented May 7, 1861-.

- Witnesses:

$7 @a %M%j4z N RRIs PETER w, PH 0 lrrln.wAsnma spool. T

UITED TATES.

IMPRQVEMEN? 1N saline.

isles.

Specification ormi gart. or Letters ra itciraaaaae. dated ay 7; i 51;

magnoncerm- 1 Be iriz nown that I, $AMUEL obtain-n,

piffhlorrisville', Bucks county, Pennsylvania,

hare inwent'ed certain new and useful Improveinents'in' Sewing-Machines;and. Ldoherehy declare the following to be a full, clear, and

enact description of the same, reference being td the-accompanyin gdrawings", andt'o the lettersof reference marked thereon;

My inventionconsists, first,.it a; novel de'; vice forirnpartin gtension to the needle-thread; secondly, in a device for iinpartingtension to the shuttle-thread;

Iii cider toenable others to make and use my invention, I will nowproceed to describe its construction and operation.-,

-On reference to the accompanying drawings,

which form a. partof this specification, Figure I is aside view 'of asewing-machine with my. improvements; Fig. 2, an inverted plan view;

an inside face view'oi' theshhttlerae and shuttie; Fig.6 aiplan View ofFig.5; Fig.7, a transverse verticalsection of Figs-5 on the line 1 2;and Figs 8 and 9, enlarged sectional views of the, discoidul shuttle orspool-case, with the Similar letters refer to similar palrts throughoutthe several-views. j A re'presentsthe base-plate of the machine, afitLBthe stationary arm secured 'tothe said.-

plate. I

To a pin, a, on theunder side of the baseplateisjointed the needle-armG, which passes through lhe'plate and through the lower portion. of thestationary arm B, the upper edge otthe needle-arm forming part of thecircuni-" 'ference .of a circle of which the fulcrum-pin a is thecenter, the under edge of the stationary" 'ar'in' being formed to.coincde with this circle,

as seen'i'n Fig. 1. l l 4 D ist'he drivingshaft, turning-in projectionsb and b-\ on the underside of the base A, this shaft heingfurnishedwitha'driving-pulley, 0,1 and a scrolhcam pulley, E, into the groove ofwhich tits a roller hung to a pin onthe end of the short arm d of theneedle-arm O. The needie e is bent to'such-a curvia and is secured tothe end of the needlearm in such a posit-ton that it shall coincide orea ly coincide with the under edge of the stationary arm B, which edge,asbefore remarked, isfpart of the circumference oia circle-of which thepin a (the .cente r of vibration of the needle-arm) is thecentenasidescribed inthe patent granted to.

me and F. E. Jackson, November 9, 1858.. To the top of the stationaryarin B is se'--' cured the inclined. pillar 'F, and in front of thelatter is attached a bar,-G, by means ofa set screw, h,'.between theheadof which and the bar intervenesa helical spring, as seen in Fig.

4. This bar G is made concave on the inside, so-as to be adapted to thepillar, and has at the top a notch for receivin g the needle-thread,

the latter passing from the spooLthrough an orificein the pillar, andupward h'etw'eeuthe latter and the bar G:

eye'for the passage of the needle-thread. The

upper edge of the short arm of this lever is 1 curvcd ,,and arranged tobear against a spring,

j, secured to the stationary ariri B, to which is into theueedle-arui,,servesto limit the move- .ment of the said lever. Thestationary arm B is furnished with a spring pressure-bar, J, having theusual pad and the lever l for elevating the said bar, and allowing it tofall by the action of the spring'at pleasure. as these devices arecommou'to otherfsewiug-machines,and as.

they form no ,part'oi my present im provements,

further allusion to them will be unnecessary.

v The curved needleepassesthrough a guided, situated atjtheoutenektrem-ity of the stationary \armB, the slot through whichtheneed'le passes heingopen in front, so asto prevent the cutting-of thet hread,'-and of a width suificient to allow the needleto p ass freelywithout pro. ducing inordinate friction. ".Ehe needle-thread, as betbreremarked, passes through an orifice inthe inclined pillar F, and upwardbetween 'the pillar and the spring-liar (hand through a I notch in the.iatter, from whence it passes downward throughian eye, as, on thestationary arm, upward and through the eye of the Tea pin situated nearthe end and on one side of the needle arm a lever, H,-is-hung loosely,the long arm of the lever having an lever H, and down theextremityof thethrough the eye of ward through an eye near stationaryarm,and'thence theneedle to the fabric;

To the front end of the shaft D is secured the crank-wheel "K, theperiphery of which isv eccentric with the will be rendered ap the leverbeing pro jections, pp, other on the shuttle N, which-is caveshuttle-race P shuttle is partially its circumference, a being adaparenthereinafter; T n of this crank-wheel i to the lower end of the levbrates in the under side shaft, for a purpose which h'e'pin s connectedby a'rod, I or M, whiclr vi-L of the base-plateA,

vided with two lips or'p'ro-f bearing one on one side'andtheopposite'side of the 'discoidal loosely confined to the conby theaforesaid lips. The cut away at one portion of s seen in Fig. 8, thisportion" pted to and resting onthe ledge q-q,

which forms the are of a circle the'center of .whichis at a'pointbetween the fabric to be operated on and the u the latter being .pr

.race by the projection to,

ppcr edge of the shuttle," evented from'risin'g in the near whichisanopen ing for guiding the shuttle-thread, as seen in- Fig. 5. One portiotle-race is hinged a proper position by which the loose portion ofthedepressed and the n of the ledge got the shut t r, andis confined to itsa set-screw, s, on turning ledge may be sh u ttle abstracted from the 4race. A curved groove, t, is formed in the latter for receivingvtheneedle, the groove terminating at a Fig. 6, which serves to needle at apoint D on and the shuttle.

the upper end of slotted opening, u, guide and steady the ctween thefabric operated The shuttle itself, which will be best observed onreference Figs.8 and 9, is comp casing, Q, with a circ the spool B. Thisconnected togetherby in its proper brating lever edge of ception ofthe's secured to thecase, the latter at av poin spool-thread passe Ibetween the spri through an eye n the guide-opening through the latter tfurnished with a bl as to be readily mo along the spring, t

creased or diminished ac tion occupied by the bloc To a st tionaryjcctions on the nod hung the rocking of whichis jointed the latterproject The endfiot' the ar opening in the has die, the projecting theusual serrated position in the cas and its projections. the outer caseis c s through this orifice, ng and the case, and thence ear the end ofthe spring to to the enlarged views, osed of an outer shell or ularrecess for containing consists a tube, andis retained e hythe vi- Theupper ut away for the re-' pring T, one end of which is the opposite endbearingon t beyond the orifice o. The thence near the o the fnbr ock,u',ved be he rig projection-w, and ic. The springls which is so arrangedckward and forward idity otiwhich is in-' Kording to the posispindle, 1secured to proer side ofthe base-plate, is frame U, to the lower endanother frame, V, and from the two arms W and X. In W projects throughan eplate-at or 'near'the" neeportion of the arm havingcodes from.t-heframe.

its point on the under "screw the length of th vwill assume the spool.When thiso of two siniple disks it will be observed surface for movingthe fab,-

rich The arm X bears upon a cam, 3, on the gshaft D, as best observed onreference to Fig. 5, thiscam serving to elevate thearm, .al'ld c nseqentl to raise the serrated surface onthe-end of the arm W. :The lateralreciprocating motion \:if this surface is imparted by e-c bined a tn ofthe crank-wheel K and the spring 4, the ed e of'the crank-wheel,

which, as before remarked, is eccentric with the-driving-shaft, hearing;against the frame IV and moving it, with its ar s X and W, outward,while the spring moves 'ch tvh l i .ward-astheprojecting portion'of trcam menu of. the serrated su regulated by the screw 5, which passesthrongs an arm, 6, on the rocking frame, and bears with side of thebaseplate 'It will be evident tensionof the needle on between thespringthe amount of this fric tion hein g increased or diminished atpleasure by adjusting the set -screw it, accident, the free unwindingofthe thread Iron], the spool anditsfree passage to thefrictionalsurface is interrupted or re operation of the machine, G willbe pulled forward late'dat pleasure. The thread is caused by fricti barG' and the pillar F,

the-top of the bar position illustrated in Fig. 4, in. which case thet'rictio the thread betweentl the top of 'the barwi sitetension "beingim the obstruction to i ll beremoved, the requits free passagefrom the.bstruction is removed the spring-bar will recover its former positionand press the. thread against the pi|lar,as before. It willbe seen thatby the peculiar construction of the spring-bar and pillar and theirarrangement inlrespect to the direction of the n is self-adjusting orself-rein respect to the I do not claim y passing the needle-thread orthe shutread between a yielding bar or spring and a rigid object,inasmuch as tension has been heretotoreiimparted to threads by suchmeans; but, v

I claim as my invention and desire to secure "by Letters Patent- 1.Imparting tension 'to-theileedle-threa d for producing fthehecessarytension on the same by-means of avcoiled or other suitable spring, f,- abar, G, or its equivalent, and the pillar I, or other suitablestationary object, fulcrum 'ot' the said bar, the thread the same, thatpart of the bar acted spring, and the orificein "thepillar fo -guitle on011 bthe l the pas.

The extent'of them rface of the arm WI that byadjusting this, e stitchmay be rogu When, by any" tarded during the V by the thread and npreviously imparted to v 1e orifice of, the pillar and parted to thethread by 1 when the set 3 sage of the thread areso situated in respectto interruption of the free passage of the thread each other andz'to thedirection taken by the thread itself that any retarding of the latter ori nterruption of i tsprogress toward the fric tio'tai surface willremove the friction ca used bythe bar, as herein set forth.

2.1The combination of the spring T vith'the discoidal shuttle, when thesaid spring is so situated in respect to the orifieev and in respect tothe direction of the thread from the shuttle-sgoqlwtothe fabric thatanyretarding from the spool wiil be theceuse of'removing the friction onthe thread between the sprin g and case, as before specified.

' In testimony whereof I have signed my name to this specification in; t

I hepreseuce of two subscribing witnesses S Witnesses:

HENRY HoWsoN,

CHARLES D. FREEMAN.

AML; COMFORT, JR. 7 v

